<div class="layui-tab" lay-filter="title">
    <ul class="layui-tab-title">
        <li class="layui-this" lay-id="1">首页</li>
    </ul>
    <div class="layui-tab-content site-demo">
        <div class="layui-tab-item layui-show">
            <iframe frameborder="0" src="<{:U('admin/index/layer_index')}>" class="dy-iframe"></iframe>
        </div>
    </div>
</div>